Elevator.



PATENTED Nov. 1o, 1903,

W. HAMILTON.

A BLEVATOR.

PPIIUATIOH FILED JULY 2o. 1903.

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VmflBNtrBD Nov. 1o', 1903.

W. HAMILTON. ELBVATOR. APPLICATION FILEDV JULY Z0. 1993.

N0 MODEL.

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UNITED STATES Patented November 10, 1903.

WILLIAM HAMILTON, or oAY'IonoIIIo.

ELEVATQR.

SPECIFICATION forming part of Letters Patent No. 743,717, dated November 10, 1903.

Application and July 2o, 19,03.

4 ence being had to the accompanying draw ings, and to the figures of reference marked thereon, which form a part of this specification.

1111s invention relates to Improvements 1n elevators.

l The objectof the invention is to provide' means operated by the moving car of the elei vater to close each entrance without the use of doors. i

Preceding a detaii description of my invention, reference is made to the accompanying drawings, of Which- Figure 1 is a verticaly front elevation ,of a portion of an elevator-shaft,showing my im-v proved elevator mechanism in position therein. Fig. 2 is a vertiealside elevation. Fig. 3 is a side elevation of the upper portion of the elexvator-shaft, showing the mounting' of the p upper drum. Fig. 41s a similar view showing a modification in the mounting of the upperA drum in eases where the space in the upper portion of the elevator-shaft is limited. Fig.

5 is a detail view of a portion of thelsafetybelt, showing a modification in the construction thereof; Fig. G is a sectional View of a portion of the elevator-car adjacent to the roof.

Fig. 7 is a horizontal section on the line a: of Fig. (i.

Throughout a detail description of the'invention'similar reference characters indicate corresponding parts.

1 designates the rear and side walls of an' elevator-shaft. This elevator-shaft has in the front thereof the usual openings 2, which in the present instance are not provided with the usual doors. lWithin saidshaft isplaced a ear 3, which is elevated and lowered by any suitable power through means of the usual cable 4, passing over the usual pulley 5. Connected to the door of the elevator-ear at 7 is one end of a safety-beluwhich maybe coni serial Nu. 166,238. on moda.)

.Y i structed in' a variety of fornIs-suclnfor example, as that shown in Fig. 5 or as that ,shown in Figs. 1 and 2, which consists of twg' belts 8, which are joined by a plurality f cross-pieces 9, which forni barriers onthein terior of the openings 2 as the elevator desoends. As before stated, the ends of the` belts 8 are attached at 7 to the door of the elevator-car2 and from that point they pass downwardly around rollers 1Q, which are mounted in the lower extremity of the eleva; tor-shaft. The said safety-belt'passes upf wardly in the rear portion ofthe 'elevator' shaft around 'a drum 11, which is mounted in the upper portion of the elevator-shaft above the beam 12, on Wh eh the pulley is mounted.' The shaft 13 of said drum is mounted in4 journal-boxes 14, which are supported at each end of theshaft by means of elliptical springs 15, orA said springs may be of any suitable character, their function being to provide a yielding support for the drum in the event that the'elevator-cai" should-break from its cable support. The strength otthe springs 15 is suiicient to hold the drum 11 up in its normal position asin Fig. 2. The safety-belt is held taut in this manner. The spring 15 is supported below by a clip 16 and above bya similar clip 1G, which is attached to the lower member of the box-hearing 14. The clipsl andthe boxes 1i are inclosed and guided between two side brackets 17, which* have their ends rigidly united to Vthe beams of the elevator-shaft. l

19 designates a series of pins around the peripheryof the drum 11, which move between th'e spaces in the belt and prevent said belt from slipping or moving out of the 'proper position during the movements of the elevator.

18 designates a series of horizontal bars secured between the sidewalls of the shaft and across said shaftiminediatelybelow the drum.

20 designates a spider, of which there is one rigidly secured to each end of the drumll. These spiders in the normal movements of the drum move above the bars 18; butin the event of the drum dropping through any aceidentai breakingof the elevator-cable 4 the arms of said spider become interloeked with the bars 18, and said drum is thus prevented from rotation when in su'chposition,

As before stated, one end of the safety-belt 1s attached to the bottom of the elevator, and I will now proceed tc describe' the manner of attaching the 'other end ofsaid belt.

Referring to Figs. 6 and 7, the belt is secured at the top and in the front of the elevator-car, to rollers 2l, Wh ich are mounted on a shaft 22, having its ends journaledin suitable bearings, 23 designates two arms which are rigidly united to the roll'ers 21, and consequently are subjected toany movements that the rollers 21 may receive from the safetybelt 8. The upper ends of said arms-23 are pivotally connected at 26 to horizontal bolts 2i, which lie at right angles to the shaft 22 and project through openings in the rear wall of the elevator-car. In the event of the cable of the elevator-car snapping or in the event of any other accident happening which mightrelease the elevator-car it will be readily seen from Fig. 2 lthat the weight of said elevator-car will be transferred wholly to the safety belt 8 and thence to the drum 11. This will cause said drum to contract the springs 15, upon which its journals are supi ported, until the arms of the spider 20 engage vtary movement of said drum will cease.

with the cross-barslS, at which time any ro- Simultaneously with the dropping of the drum the tension upon said safety-belt 8, due to the Weight of said elevator-car, will cause the rollers 2l to turn upon the shaft 22 a sufficient extent to throw the bolts 24. outwardly to enter the spaces between any of the crossstated, and thus the elevator is caught and prevented from falling throughthezshaft. 1

shown therein is designed for elevator-shafts with limited space above in which the'drum '11 is to be mountedsuchffor example, Vas where the roof of a building encroaches upon the space necessary for-the drum. Iii-this case the drum is mounted between two other..

.drums 30 and 3 1 upon a frame or carriage`32,

which incloses the outer sides-of the elevatorshaft and rests upona suitable number-of coil expansionsprings 28', `Whi'elrlioldY` said v frame, with the drums'fi/nanupper o'r normal position. The coil-springs 28 are`inclosed at their 'upper ends 'by a'ngesj 3 3, which project laterally from suitable point-sof theframe or@ carriage, and the lowerendsare A:similarly ,-conned by fiang's 34, which project :laterally froni theigzgteriorsurfacemf' the elevator-shaft. ltwo:outer'drums 30%.

andl are instrumental in spreading the safety-belt 8, this being necessary in vieiv of the fact that there is not suitable space above for mounting the drum Il. The safety-belt at the front of the elevator is inclosed between outer and inner Walls Sii'and 37, so that in looking at the front of the elevator, as shown in Fig. l, there will be no part of the belt visible,excepting the-barriers 9,which will be seen extending across each opening as' the elevator descends from the last opening at which it has been stopped, and when the elevator has reached the extreme lower limit of its movement all of the doors or openings throughout the length of the shaft will be closed by these barriers.

While I have shown different constructions of safety-belts and have also shown and referred to different ways of mounting the safety-belt drum, I do not wish to limit myself to any specific Way of constructing the safety-belt and in. mounting the drum.

Having described my invention, I claim- 1. vIn an elevator, the combination with an elevator-,shaft having the usual openings, and an elevator-car within saidshaft, of a safetybelt having its ends secured to said elevatorcar, rollers located in the bottom of the elevator-shaft and around which said safetybelt passes, a drum located in the top of said elevator-shaft and around which said safety- `belt passes, and yielding bearings upon which yielding supports for said drum, and means' for interlocking the drum when moved out of its normal position, to a lower position in the elevator-shaft, substantially as set forth.

3g In an elevator, the combination with an i A elevator-shaft having the usual openings Referring now to F1g.4, the constructions Ytl'rerein,and a car within s aid .elevator-shaft, of' a safety-belt having its ends secured to opp'ositepoints of said elevator-car, rollers located in the bottom ofthe elevator-shaft and around which said safety-belt passes in the bearings. in theupper part of the elevatorshaft, said, bearings being of a yielding nasaid drum, `and a `series of horizontal rods mounted in the elevator-shaft adjacent to the horizontal rods being adapted to interlock when the drum 'is drawn to a lower position y Y from its normal position, and devices adapted saidsprings to be actuated by undue tension on the 'safety-belt and whereby said safety-belt is flocked against m ovement, lsubstantially as set forth.

IOO

les

IIO

yrear of the elevator-shaft, a drum mounted on ture, radial armsprojecting from the ends of j lower side of the drum, said radial arms and 4. ln an elevator, the combination with an elevator-shaft, and an elevator-ear therein, of a safety-belt having opposite ends attached to said elevator-car, said safety-belt being adapted to form a barrier to the entrances of the elevator-shaft as the ear moves downwardly, rollers at the bottom of the shaft around which said safety-belt passes, a drum located inthe upper portion of the shaft and around which said belt passes, safetydevices adapted to support said drum in the event that it is called upon to support the Weight of 'the elevator, and safety devices actuated by tension on the safety-,belt dueto the Weight' of the elevator-ear being transferred to said safety-belt through any accidental releasing of the elevator-car from itsn'orinal support, and whereby the safety-belt is utilized to support the elevator, substantially as set forth.

5. In an elevator, the combination Wit-h an elevator-sliaft,and an elevator-empf asafetybelt comprising a plurality of parallel crossbars which are adapted to form barriers to the entrances in the elevator-shaft, said safetybelt having its opposite ends attached to the elevator-ear, rollers located at the bottom of the elevator-shaft, and a drum located at the top of the elevator-shaft around which the safety-belt passes, means on said drum for guiding and maintaining the safety-belt in position, devices for. supporting and arresting the movement of the drum inthe event of the removal of said drum from its normal pesi.- tion, and levers and rods actuated by said safety-belt when undue tension is applied to said safetyfbelt and whereby the movement of the elevator-ear is released in the event of any aeeid ental breaking of the operating devices of the elevator, substantially as set forth. In testimony whereof l aiir my signature in'presenee of two witnesses.

l 'XVILLAM HAMILTON.

Witnesses:

R. J. MCCARTY, v JOHN W. KALBFUS. 

